fix(calendar(js)): ignore attendees when saving task

UI/WebServerResources/js/Scheduler/ComponentController.js

@@ -351,6 +351,7 @@
         this.showAttendeesEditor |= initOrganizer;
       }
 
+      if (_.has(this.component, '$attendees'))
         $timeout(scrollToStart);
 
       return $q.all(promises);
@@ -630,11 +631,13 @@
     };
 
     function updateFreeBusy() {
+      if (_.has(vm.component, '$attendees')) {
         vm.component.$attendees.updateFreeBusyCoverage();
         vm.component.$attendees.updateFreeBusy();
         $timeout(scrollToStart);
       }
     }
+  }
 
   angular
     .module('SOGo.SchedulerUI')